Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
  • C07F1/005—Compounds containing elements of Groups 1 or 11 of the Periodic Table without C-Metal linkages
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
  • C07F9/6515—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having three nitrogen atoms as the only ring hetero atoms
  • C07F9/6518—Five-membered rings
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C1/00—Photosensitive materials
  • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
  • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
  • G03C1/08—Sensitivity-increasing substances
  • G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising

Definitions

• Gold compounds may contain gold in the (I) or (III) oxidation state. However, those in the (I) oxidation state are preferred because those gold compounds in the (III) oxidation state may undergo side reactions that, for example, oxidize gelatin or other components in photographic emulsions.
• gold(I) compounds trisodium aurous dithiosulfate is commonly known as a chemical sensitizer, but is not universally applicable because of the disadvantages this compound provides.
• this gold(I) compound contains two thiosulfate ions that are bonded to gold. These ions may also undergo sensitization reactions in addition to the gold in a photographic silver halide emulsion.
• a photographic silver halide emulsion preferably a gelatin emulsion, chemically sensitized with a gold(I) compound of the formula: AuL2+X ⁇ or AuL(L1)+X ⁇ wherein L is a mesoionic compound; X is an anion; and L1 is a Lewis donor ligand.
• the gold sensitizing compounds may be added singly or in combination with other sensitizing agents. They may also be added to a silver halide emulsion along with silver ion ligands and silver halide growth modifiers or stabilizers and antifogging agents, or with spectral or chemical sensitizing agents such as sulfur or selenium compounds or with dopants such as iridium complexes, during formation of silver halide grains, during the physical or chemical ripening stage, or in a separate step before coating.
• the photographic silver halide materials can also be used in physical development systems as described in Research Disclosure Section XXII, in image-transfer systems as described in Research Disclosure Section XXIII, in dry development systems as described in Research Disclosure Section XXIV and in printing and lithography materials as described in Research Disclosure Section XXV.
• the chemical sensitizers indicated in the table below were added next, followed by 30 mg of the finish modifier 3-methyl-1,3-benzothiazolium iodide.
• the sulfur sensitizer employed in this example possessed the structure S-4.
• the temperature of the emulsion samples was raised to 65°C and held for 5 minutes before cooling. 1.75 mg per Ag mole of the stabilizing agent 4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene sodium salt was added as an addendum.
• Ph herein means phenyl.
• the emulsion samples were coated on film support at 75 mg Ag per ft2 and 585 mg gelatin per ft2 with 30 mg per ft2 of a magenta color-forming coupler having structure S-5 and 3 mg per ft2 of a development inhibitor releasing compound having structure S-6.
• a protective overcoat containing 209 mg gelatin per ft2 with a gelatin hardener was also applied.

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• 1990
  • 1990-11-16 US US07/614,536 patent/US5049485A/en not_active Expired - Lifetime
• 1991
  • 1991-11-14 DE DE69124772T patent/DE69124772T2/de not_active Expired - Fee Related
  • 1991-11-14 EP EP91119458A patent/EP0486026B1/de not_active Expired - Lifetime
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